Automatic flood-gate.



W. S. EDGE.

AUTOMATIC FLOOD GATE.

APPLIOATION FILED NOV. 3, 1911.

Patented Sept. 17, 1912.

3 SHEETS-SHEET 1.

W. S. EDGE.

AUTOMATIC FLOOD GATE.

APPLICATION FILED NOV. 3, 1911.

1,039,0'?2, Patented Sept. 17, 1912 3 SHEETS-SEES" .2

Q MN WI In, 1 I I In "m1" W w. s. EDGE. AUTOMATIC FLOOD GATE.

APPLICATION FILED NOV. 3, 1911.

Patented Sept. 17, 1912 3 SHEETS-SHEET 3 l M i gvwentoz lll 'r s. am, or new roan, n. in.

Specification of Eettera intent. application filed Movember 3, 1911. aerial nactaeti.

moon-earn. I

Paton seat. at, rare.

' hold the water at a predetermined level and when a slight rise above this level occurs,

will quickly open and allow the flood to pass without a lowing the. water above the gate to rise more than'a slight amount.

A further object'ot' my invention isto provide a construction in which the gate can be easily removed. without the necessity oldismembering any of its parts.

Referring to th part of this specification-Figure l is a perspective view of a construction embodymg my invention in which the gate is shown '0 n position- Fi 2 is a side elevation of t e movable gate s own in its closed position in full lines and in its open osition in dotted lines. Fig. 3 is a view o a portion of the gate showing a guide wall and art of the bearing-on which the gate rocks. ig. 4: is a cross sectional viewthrough \one side of one of the walls which support the gate. Fig. 5 is'a plan view of the gate and.

side walls. Fig. 6 is a side-view of one of the bearing element-s carried by the gate. Fig. 7 is an edge View of the construction shown in Fig. 6. Fig. 8 is an edge view and i Fig. 9 a side view of one of the bearing elements which is attached to one of the side walls and on which the gate rocks.

A, indicates the movableate supported by two side we respectively. The said side walls are-prefera 1y .supported on a concrete base 1),, the top surface of which is inclined at each side of the gate A as illustrated. The water the walls in the direction indicated by the arrow E.

The walls B and C are preferably made of concrete material and are each provided with a guideway F, which extends from the top of the wall for a short distance and is then curved 'as illustrated at F. The

drawings which form a which is gate in proper position durin curved portion of the .guideway is provided with a metal lining G on its upper and lower.

sides. An abutment block H is fastened to each side wall with their faces in line with one edge of the guideway F as illustrated to'support the gate when at rest in its vertical or closed position. A similar abutment .l-l' vis located below the point at which the gate rocks and disposed to aline with the v surface of the gate on the opposite side to the abutment Hwhen the gate is in its vertical position. Carried by each side wall is a metal block T, which is provided with a curved surface T, and'formed at each end of said curved surface are offsets T and l res ectively.

he gate is provided at each side near the thereof with brackets J which carry short shafts on which the wheels J rotate These wheels J enter the guideways Gr serve to guide and support the gate A in its opening and closing movements.

Mounted on the gate at each side andbe low the middle thereof, is a rectangular shaped casting K which is provided Wlllll. a projecting portion K having a straight plane face. This face is adapted to contact with the curved surface forming the been and in I.

The bottom end of the gate is beveled as illustrated at L to correspond with the in clined surface D.

When the gate is-in its closed position: the lower end of the projecting. ortion K rests against the abutment ll an when the gate is in its extreme open posite end of the portion K abuts the abut: ment 1. The curved guideway F is formed to permit the gate in its opening movement to rock smoothly on the bearing surface I, the wheels J serving its opening and closingmovements gas w 1 be readily understood. When the gate is in its extreme open position as illustrated by dotted lines in. Fig. 2, one end thereof comes in contact with .the abutments M, M, which are conto hold the as indicated at 0- in 2. The abutments- H and H contact with the gate when the gatis in itsclesed position and serve to p'revent leakage-past the ate.

' e gate may or may not be constructed heavier below the point of the axis on which it rocks than above, as the water pressure controls entirely the operation of the gate regardless of its weight. Due to the con struction of the bearing parts I and K, the point of support of the gate constantly changes as the gate opens under. controlof the .wheels, so. that when' the gate once starts to open or close, it will continue to so move until fully opened or closed pro-' vided there is no decided change in the water level during the motion. 9

' The operation of the gate depends upon the fact that the center ofpressure of the total water pressure acting on a rectangular surface such as that presented by th'egate is at two-thirds of the depth below the surface; The normal water level is carried at ,a predetermined distance below the top of the gate, which distan'ce depends upon a number of factors efliectingthe particular design. The distance from the-water level to the ivotal pointli'is 2n or twice the distance l i'om the point If to the bottom of the gate. The gate'then-about to open. A

slight rise in the water level throws the gate.

out of balance by moving the center of pres sure above the pivot-point Iv and the curved guideway is so designed that the gate rolling upon it and guided and restrained by the wheels J will continue to openwith a steady motion until it is fully open'. In this position thewater will discharge both overjand under the gate. The purpose of the air pas: sage O isto admit air below the gate and prevent the formation of a :vacuum under the gate when the gate starts to close. As

soon as' the flood is past and'the level of water abovethe gate is lowered, the gate will at once close with a-steady motion and will close tightly leaving the water level slightly below the normal water level above the gate.

" difi'erent materials dependin gate might be made of wood and the side walls of'wood or other suitable material.

The gate may be removed by lifting it vertically, the wheels J passing up through that portion of the guideway indicated by F and since there is nothing on the side wall to obstruct the gate in its upward movement, it may be removed in case repairs are necessary.

gate may rock, and meanscooperating with said guideways to hold said gate in proper position durmg its opening and closmg movements. 2. An automatic flood gate comprising two walls spaced apart from each other, each of which is provided with a curved guideway, a gate supported below its median center line on bearin s carried by said walls, said gate being provided with guiding means which enter said ideways in said walls.

3.-An automatic flood. gatecomprising two walls spaced apart from each other, each of which is provided with a guideway which iso en from the top to the bottom thereof and one portion of which is curved, a gate whichextends from one wall to the other, means carried by said walls on which said gate may rock, and means mounted on A said gate and movable in said guideways to hold said gate in proper position during its opening and closmg movements.

4. An automatic flood gate comprising two walls spaced apart from' each other, each of which is provided with a curved guideway and a gate which extends from one wall to the other, curved bearings on which said gate may rock, and means cooperating with said guideways to hold said gate in proper positlon during its opening v and closing movements.

5. An automatic flood gate comprising two walls spaced apart from each other, each ofwhich is provided with a curved guideway, a gate which extends from one wall to the other, curved bearings on which said ate/may rock, each of said bearings provi ed with an abutment at each end thereof, and means cooperating with said guideways to-hold said gate in-proper position duringits opening and closing movements.

' .6. An automatic flood gate comprising two walls spaced ,apart from each each of which is provided with a other curved guideway, a gate which extends from one wall to the other and provided at each side thereof with a projectin bearin portion, a curved bearing carrie by each of said walls on which sald projectin portion rocks, said gate carrying at each sigle thereof projecting means which enter said curved guideways to hold said gate in proper position during its opening and closing movements.

7. An automatic flood gate comprising two walls spaced apart from each other, each of which is provided with a curved guideway, a gate which extends from one 130 msep'm I m wall to the other, wheels carried by said gate New York and State of New York this 21101 near the top emi thereof and entering said dlay of November A. D. 1911.

guideweys curve& hearings on which said gate may rock, and means carried 1) said WALTER EDGE 5 wells to serve as abutments for sai gate Witnesses:

when in its open posit-ion. FRANK M. ASHLEY, Signed at New York city in the county of Mmnm S. MILLER. 

